/Engine/Source/Runtime/Experimental/Iris/Core/Public/Iris/ReplicationState/Private/IrisFastArraySerializerInternal.h
The idea is to provide an interface that is modeled after what we can do with aTArraybut with dirty tracking per member This way we can update changemask directly and does not need to poll for changes
void Add ( const [FastArrayItemType](API\Runtime\IrisCore\Iris\ReplicationState\Private\TIrisFastArrayEditor\FastArrayItemTyp-) & ItemEntry )